[PATCH v3 -next 0/3] RISC-V: ACPI: Add LPI support
Sunil V L
sunilvl at ventanamicro.com
Wed Feb 14 20:37:03 PST 2024
Hi Rafel,
On Thu, Jan 18, 2024 at 11:59:27AM +0530, Sunil V L wrote:
> This series adds support for Low Power Idle (LPI) on ACPI based
> platforms.
>
> LPI is described in the ACPI spec [1]. RISC-V FFH spec required to
> enable this is available at [2].
>
> [1] - https://uefi.org/specs/ACPI/6.5/08_Processor_Configuration_and_Control.html#lpi-low-power-idle-states
> [2] - https://github.com/riscv-non-isa/riscv-acpi-ffh/releases/download/v/riscv-ffh.pdf
>
Could you please take a look at this series also and provide ACK if
looks fine?
Thanks,
Sunil
> Changes since v2:
> 1) Added "riscv_" prefix for functions made non static (Feedback from Drew)
> 2) Added RB tags from Drew.
>
> Changes since v1:
> 1) Reordered the commits such that the patch which enables
> ACPI_PROCESSOR is the last one in the series.
> 2) Used GENMASK and other changes to address Drew's comments.
> 3) Moved common functions required by both DT and ACPI based cpuidle
> drivers from the DT driver to common arch/riscv/suspend.c.
> 4) ACPI cpuidle driver is added under drivers/acpi/riscv
> 5) Rebased to latest for-next branch of linux-riscv.
>
>
> Sunil V L (3):
> cpuidle: RISC-V: Move few functions to arch/riscv
> ACPI: RISC-V: Add LPI driver
> ACPI: Enable ACPI_PROCESSOR for RISC-V
>
> arch/riscv/include/asm/suspend.h | 3 ++
> arch/riscv/kernel/suspend.c | 49 +++++++++++++++++
> drivers/acpi/Kconfig | 2 +-
> drivers/acpi/riscv/Makefile | 3 +-
> drivers/acpi/riscv/cpuidle.c | 81 +++++++++++++++++++++++++++++
> drivers/cpuidle/cpuidle-riscv-sbi.c | 49 ++---------------
> 6 files changed, 141 insertions(+), 46 deletions(-)
> create mode 100644 drivers/acpi/riscv/cpuidle.c
>
> --
> 2.34.1
>
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